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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: PBEPBE/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C*V 1Σ
Energy calculated at PBEPBE/6-31G**
 hartrees
Energy at 0K-2647.920374
Energy at 298.15K-2647.922852
HF Energy-2647.920374
Nuclear repulsion energy123.727953
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at PBEPBE/6-31G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Σ 3433 3386 95.04      
2 Σ 2137 2107 26.81      
3 Σ 600 592 2.46      
4 Π 637 628 40.31      
4 Π 637 628 40.31      
5 Π 371 366 6.68      
5 Π 371 366 6.68      

Unscaled Zero Point Vibrational Energy (zpe) 4093.5 cm-1
Scaled (by 0.9863) Zero Point Vibrational Energy (zpe) 4037.4 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at PBEPBE/6-31G**
B
0.13289

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-31G**

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.321
C2 0.000 0.000 -1.102
Br3 0.000 0.000 0.684
H4 0.000 0.000 -3.393

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.21863.00461.0722
C21.21861.78612.2907
Br33.00461.78614.0768
H41.07222.29074.0768

picture of bromoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 Br3 180.000 C2 C1 H4 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.228      
2 C 0.107      
3 Br -0.046      
4 H 0.167      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -0.133 0.133
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.052 0.000 0.000
y 0.000 -30.052 0.000
z 0.000 0.000 -21.899
Traceless
 xyz
x -4.077 0.000 0.000
y 0.000 -4.077 0.000
z 0.000 0.000 8.153
Polar
3z2-r216.306
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.744 0.000 0.000
y 0.000 2.744 0.000
z 0.000 0.000 8.914


<r2> (average value of r2) Å2
<r2> 84.558
(<r2>)1/2 9.196